火灾下外加强环式组合节点温度场研究

摘要

In this paper , two kinds of composite joints with external reinforcing ring of concrete filled steel tubular column-steel beam have been designed, for which the temperature distribution in international standard fire has been presented by ANSYS software. The consistence of the FEM and the experimental results proved the reliability of numerical simulation. Analysis has been given for influencing factors of cover thickness, steel plate thickness and width, core concrete, and concrete floor. These works above give a good support for further works on the research of fire-resistance behavior for joints of this kind.%设计了两种外加强环式钢管混凝土柱-钢梁组合节点,通过大型通用有限元软件Ansys模拟计算了其在标准火灾升温曲线作用下的温度场分布,计算结果与有关实验结果基本吻合,证明了数值分析的可靠性,并对其保护层厚度、钢板厚度及宽度、核心混凝土、及混凝土楼板等影响因素做了分析, 为进一步研究此类节点的抗火性能奠定了基础.